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ISOBUTYL ISOSTEARATE.

Valuable CAS 151270-66-5 / SKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT

Isobutyl Isostearate is a synthetic ester highly valued for its emollient and skin conditioning properties. It imparts a soft, smooth feel to the skin by forming a non-greasy, hydrophobic film that helps reduce transepidermal water loss.

Emollient Lubricant Skin Conditioning

Science

Functioning primarily as a surface lubricant, Isobutyl Isostearate enhances skin texture, contributing to a perceptibly smoother feel. Its low viscosity and oily nature allow for the formation of a fine, hydrophobic film upon application, which effectively minimizes moisture evaporation from the skin and provides conditioning benefits. This action helps maintain skin suppleness and hydration.


Research

Medium confidence
Effective range 2–5%
Optimal

3.5%

Key findings

  1. 01 Observations indicate that Isobutyl Isostearate, when utilized in concentrations between 2% and 5%, effectively acts as an emollient, lubricant, and skin conditioning agent, leading to a smooth skin appearance and forming a protective, non-greasy film.

Transparency

Not commonly dusted

The Formula

Solubility
Oil
Optimal pH N/A
0 7 14

Safety

CIR Status
Safe as used
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel has determined Isobutyl Isostearate to be safe within current cosmetic practices and concentrations, provided formulations are designed to be non-irritating. However, its medium comedogenicity should be considered during formulation, especially for products targeting acne-prone skin.


Your Skin

Yes Normal
Yes Dry
No Oily
Yes Sensitive
Irritancy Low
Comedogenicity Medium

Our Assessment

Valuable

Isobutyl Isostearate is a valuable emollient and skin conditioning agent, enhancing skin smoothness and hydration while offering low irritancy, though its medium comedogenicity should be noted for acne-prone skin.


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